A boy who has sex but never ejaculates. he just stores it up for months on end.
Bobby tried it again last night.
Yeah, hes a real FullCock.
by Mar.C June 15, 2009
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A boy almost at adulthood who hasn't had sex. He is constantly sexually frustrated, causing his hand to shake violently over all objects even remotely penis shaped, for example drink glasses and chair legs.
OMG, that guy is such a fullcock!
by salrgs April 19, 2011
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